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High-side power switches roll for consumer devices

Posted: 21 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:high-side? load switch? consumer devices?

Micrel Inc. has launched the MIC94070/1/2/3 series of high-side load switches, aimed at mass market consumer devices.

Featuring a typical RDSON of 120m?, the devices operate with inputs ranging from 1.7-5.5V. Each IC can be driven by a mere 1.5V of logic, which is accomplished by incorporating a novel built-in level shift circuitry that allows low voltage logic to control higher voltage supplies.

Battery time is greatly extended in portable applications due to the low operating current of 2?A and shutdown current of less than 1?A. The MIC94070 and MIC94071 both have rapid turn-on, while the MIC94072 and MIC94073 provide a slew rate controlled soft-start turn-on of 800?s (typical) that prevents in-rush current. In addition, the MIC94071 and MIC94073 provide an active load discharge circuit that insures capacitive loads retain no charge when the main switch is in an OFF state.

The MIC94070/1/2/3 series are available housed in the thin 4-pin 1.2mm x 1.6mm MLF and Teeny SC-70-6 packages.

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